Use named option for sorting instead of numeric value for better
readability.
Switch sorting from memory to CPU. As I'm mostly interested in CPU right
now.
Also do no longer show the path to the program, I just don't care.
There is a module for htop, so use that one instead of home.file.
The cool thing is: It has "constants" for some strange integer values.
So nix version is actually readable while the generated config is
strange.
That's a cool pro of nix files.
